The sce-file with objective tracks are based on version 2.6 of the Weserübung scenario while I tries to upgrade Erik's version 4.9 with my swedish army.

If it's just an oob upgrade, then start with the 2.6 binary loaded, then upload your xml oob file - the oob will update while the old tracks will remain. As I said, the F5 thing doesn't overwrite the tracks.

Now, if there's more to it than just the oob, that may not work too well - but it would be worth a try. You can also upload any event changes separately, too.